Several of our readers sent us a heads up about a Linux kernel vulnerability which was previously patched, but has
leaked back into the kernel.
The vulnerability exists in the 32-bit compatibility mode of the kernel and upon execution can result in a local root
compromise.

The Heise security team reportedly obtained a root shell on 64-bit Ubuntu 10.04 using this exploit.

The current workaround involves temporarily disabling the execution of 32-bit applications (See Full-Disclosure and the Redhat article below for details)

Reportedly all current Linux kernels are affected (patch is in the works) as well as backported kernels from vendors like Redhat.